by Saint and Emperor Justinian the Great
There are two greatest gifts which God, in His love for man, has granted from on high: the priesthood and the imperial dignity. The first serves divine things, while the latter directs and administers human affairs: both, however, proceed from the same origin and adorn the life of mankind. Hence, nothing should be such a source of care to the emperors as the dignity of the priests, since it is for their imperial welfare that they constantly implore God. For if the priesthood is in every way free from blame and possessed access to God, and if the emperors administer equitably and judiciously the State entrusted to their care, general harmony will result, and whatever is beneficial will be bestowed upon the human race.